If the definition of behaviour is 'appearance or pretense' then the opposite of behaviour is reality, so yes it is an antonym.
Reason is an antonym
The antonym for the word "crime" is "virtue", which means behavior showing high moral standards.
The antonym of "timidly" is "boldly." While "timidly" suggests a lack of confidence or courage, "boldly" implies a sense of bravery and assertiveness in actions or behavior.
Instinct and learned behavior are antonyms because learned behavior means someone helps you and instinct maens to do it by yourself.
"Sly" is usually considered an antonym of "honest" or "straightforward". It means clever or cunning in deceiving others, while the latter terms imply truthfulness and transparency in behavior.
An antonym for the word "addict" is "abstainer." An addict is someone who is physically or mentally dependent on a substance or behavior, while an abstainer is someone who refrains from indulging in that substance or behavior. The two terms represent opposite ends of the spectrum in terms of dependency and self-control.
The antonym of the word 'synonym' is 'antonym'.
An antonym means "opposite". So an antonym for the word synonym is antonym.
An antonym for "meek" is "assertive." While "meek" describes someone who is submissive or gentle, "assertive" refers to a person who confidently expresses their opinions and stands up for themselves. This contrast highlights differences in behavior and attitude toward others.
The antonym of "erratic" is "consistent." While "erratic" refers to something that is unpredictable or irregular, "consistent" describes something that is stable, reliable, and uniform over time. Consistency implies a steady pattern or behavior, contrasting with the unpredictability of erratic actions or conditions.
The antonym for from is to. Because antonym means opposite.